Summary: The further development of an immersed-boundary method for general flow applications is outlined in this paper. A cell-classification procedure based on a signed distance to the nearest surface is used to separate the computational domain into cells outside the immersed object (field cells), cells outside but adjacent to the immersed object (band cells), and cells within the immersed object (interior cells). Interpolation methods based on laminar/turbulent boundary layer theory are used to prescribe the flow properties within the band cells. The method utilizes a decomposition of the velocity field near embedded surfaces into normal and tangential components, with the latter handled using power-law or log-law interpolations to mimic the energizing effects of turbulent boundary layers. Procedures for generating motion events using rendering technologies are described as methods for directly embedding sequences of stereo-lithography files representing frames of motion as immersed objects in the computational domain. Extensions of the methodology to zero-thickness immersed surfaces are discussed. Described applications center on human motion events, with a focus on understanding the effect of human motion on agent transport in confined environments.
For the entire collection see [Zbl 1470.76005].